President Trump's nominee for the top technology post at the Pentagon believes boost-phase missile defenses could be rapidly deployed to counter North Korea's ballistic missile program, arguing only "will" has prevented the Defense Department from doing so already. Former NASA Administrator Mike Griffin, nominated by President Trump to serve as the under secretary of defense for research and engineering, appeared before the Senate Armed Services Committee on Thursday for his confirmation hearing. He was asked by Sen. Tom Cotton (R-AR)...